Numbers and Operations Teacher Resources

This video continues looking at dividing complex numbers by looking at the conjugate of a complex number. The instructor then uses the conjugate to rationalize the denominator of a rational expression with a complex number in the...

This video continues looking at dividing complex numbers by looking at the conjugate of a complex number. The instructor then uses the conjugate to rationalize the denominator of a rational expression with a complex number in the...

In this video, a complex number is defined and graphed on the complex plane. Sal also shows how to add, subtract, and multiply two complex numbers. He shows how to divide two complex numbers but runs out of time and continues in the...

In this video, a complex number is defined and graphed on the complex plane. Sal also shows how to add, subtract, and multiply two complex numbers. He shows how to divide two complex numbers but runs out of time and continues in the...

Deepen the number sense of your math class with a short presentation on writing equations. Using the relationship between numbers, young mathematicians learn how to determine the missing operator in an equation. A number of opportunities...

Two very similar numbers and you have to figure out which one is larger. The teacher diagrams a place value chart and shows you how to write the two numbers to make a comparison.

Please Excuse My Dear Aunt Sally - or whichever mnemonic your students use for the order of operations - is the focus of this video. Sal takes viewers through various mathematical equations that require the use of the order of...

So you want to put some given values in order from greatest to least? The instructor starts out by drawing a place value chart. She then inserts all the numbers into the chart. This helps you visually see their value so you can compare...

Don't worry, this resource actually exists. Scholars learn about imaginary numbers and work on problems simplifying square roots of negative numbers. As an extension, they research the history of imaginary numbers.

Two very similar numbers and you have to figure out which one is larger. The teacher diagrams a place value chart and shows you how to write the two numbers to make a comparison.

Your learners use many different number representations like positive and negative integers, exponents, radicals, and combinations of operations as they learn and strengthen their use of the order of operations. Thoughtfully organized to...

Inject fun into your math review! Pupils review basic math operations with decimals as well as addition and subtraction with simple fractions. In this number operations lesson, learners work in groups to create a game for the math skill...

There is only one variable in this word problem. Yeah! So unpack the words and write them as a mathematical expression. Then make sure to use the order of operations to solve and arrive at the solution.

Help the class visualize operations with complex numbers with a lesson that formally introduces complex numbers and reviews the visualization of complex numbers on the complex plane. The fifth installment of a 32-part series reviews...

Line up your numbers! The instructor shows you how to line your numbers up by place value. Then step by step she subtracts each place value. She demonstrates how to borrow when the top value is less than the bottom value you are...

You've been given a number written in expanded form. You have to write it in standard form, and in word form. The instructor does a nice job illustrating and explaining just how to do both of these operations.

Whole numbers are the natural numbers including zero. The instructor illustrates and explains place value. She draws a place value chart and then defines each term and what the numbers mean. She writes a number in standard form and then...

So you want to put some given values in order from greatest to least? The instructor starts out by drawing a place value chart. She then inserts all the numbers into the chart. This helps you visually see their value so you can compare...

So you want to put some given values in order from least to greatest? The instructor starts out by drawing a place value chart. She then inserts all the numbers into the chart. This helps you visually see their value so you can compare...

The last video in a series about imaginary numbers demonstrates the need for complex numbers. Math pupils learn that they need to include the square root of negative one, the building block of the complex...